IEEE 1471 - ISO 42010
ISO/IEC/IEEE 42010:2011 defines requirements on the description of system, software, and enterprise architectures. It aims to standardize the practice of architecture description by defining standard terms, presenting a conceptual foundation for expressing, communicating, and reviewing architectures, and specifying requirements that apply to architecture descriptions, architecture frameworks, and architecture description languages.
IEEE 1471 - ISO 42010 Standard.